Steric Isotope Effects Gauged by the Bowl-Inversion Barrier in Selectively Deuterated Pentaarylcorannulenes. Tomoharu Hayama, Kim K. Baldridge, Yao-Ting Wu, Anthony Linden, Jay S. Siegel* Institute of Organic Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland E-mail: jss@oci.unizh.ch Supporting information [30 pages]